For me, this only removes the move-symbols (the transparent circles with arrows on gentmatt's screenshot above). The three finger touch gesture still moves/resizes the windows, but without showing those symbols.
–
Alfred GodoyJun 3 '12 at 18:44

2

I can confirm that this does not disable 3 finger gestures. I have MT Grab Handles disabled and I am still able to 3 finger drag windows around the screen. I would really like to disable this functionality. Any helpful contributions would be greatly appreciated.
–
oznahJun 10 '12 at 3:11

The trackpad is configured by default to ignore three-finger taps (and three-finger clicks), and can be set it to regain control of it, thus overriding the window move association to three-finger taps. This is how it can be done:

where [id] is replaced by the id value (which is 12 in the given example). Now locate the Synaptics Tap Action property (e.g. Synaptics Tap Action (282): 2, 3, 0, 0, 1, 3, 0) and note its number, it will be enclosed inside round brackets (here it's 282). Also note the property values, we will use them later.

Assuming you want this behavior at startup, create a shell script and add it to the startup programs. Let's call this script trackpad.sh. Our goal is to replace the last value with a new one, e.g. for middle click. Edit the script to contain the following: